[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 14.403228][ C1] random: crng init done [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.116' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 37.890912][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 37.900896][ T102] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 37.901255][ T17] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 37.908692][ T12] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 37.923545][ T5] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 37.931073][ T1741] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 38.141152][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 38.160954][ T17] usb 5-1: Using ep0 maxpacket: 8 [ 38.170934][ T12] usb 4-1: Using ep0 maxpacket: 8 [ 38.176087][ T102] usb 6-1: Using ep0 maxpacket: 8 [ 38.181323][ T5] usb 3-1: Using ep0 maxpacket: 8 [ 38.186612][ T1741] usb 2-1: Using ep0 maxpacket: 8 [ 38.261390][ T83] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 38.269653][ T83] usb 1-1: config 0 has no interface number 0 [ 38.275992][ T83] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 38.285907][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 38.293968][ T17] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 38.302078][ T17] usb 5-1: config 0 has no interface number 0 [ 38.308917][ T17] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 38.311129][ T5] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 38.318004][ T17] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 38.326216][ T5] usb 3-1: config 0 has no interface number 0 [ 38.338711][ T83] usb 1-1: config 0 descriptor?? [ 38.340607][ T12] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 38.349967][ T17] usb 5-1: config 0 descriptor?? [ 38.353376][ T12] usb 4-1: config 0 has no interface number 0 [ 38.353465][ T102] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 38.372699][ T102] usb 6-1: config 0 has no interface number 0 [ 38.378795][ T1741] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 38.382722][ T83] rio500 1-1:0.67: USB Rio found at address 2 [ 38.386918][ T1741] usb 2-1: config 0 has no interface number 0 [ 38.398554][ T17] rio500 5-1:0.67: USB Rio found at address 2 [ 38.402017][ T12] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 38.414324][ T12] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 38.425239][ T102] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 38.434444][ T102] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 38.442710][ T5] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 38.451876][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 38.459904][ T1741] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 38.469083][ T1741] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 38.477947][ T12] usb 4-1: config 0 descriptor?? [ 38.483831][ T102] usb 6-1: config 0 descriptor?? [ 38.489620][ T5] usb 3-1: config 0 descriptor?? [ 38.496134][ T1741] usb 2-1: config 0 descriptor?? [ 38.522421][ T12] rio500 4-1:0.67: Second USB Rio at address 2 refused [ 38.529541][ T12] rio500: probe of 4-1:0.67 failed with error -16 [ 38.537607][ T102] rio500 6-1:0.67: Second USB Rio at address 2 refused [ 38.545950][ T5] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 38.557137][ T1741] rio500 2-1:0.67: Second USB Rio at address 2 refused [ 38.564152][ T102] rio500: probe of 6-1:0.67 failed with error -16 executing program executing program [ 38.570988][ T5] rio500: probe of 3-1:0.67 failed with error -16 [ 38.578780][ T1741] rio500: probe of 2-1:0.67 failed with error -16 [ 38.595319][ T83] usb 5-1: USB disconnect, device number 2 [ 38.607301][ T83] rio500 5-1:0.67: USB Rio disconnected. [ 38.617457][ T17] usb 1-1: USB disconnect, device number 2 [ 38.624250][ T17] ================================================================== [ 38.632413][ T17] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 38.640727][ T17] [ 38.643042][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0+ #0 [ 38.650121][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.660159][ T17] Workqueue: usb_hub_wq hub_event [ 38.665209][ T17] Call Trace: [ 38.668496][ T17] dump_stack+0xca/0x13e [ 38.672730][ T17] print_address_description+0x6a/0x32c [ 38.678284][ T17] ? disconnect_rio+0x12b/0x1b0 [ 38.683120][ T17] kasan_report_invalid_free+0x61/0xa0 [ 38.688567][ T17] ? disconnect_rio+0x12b/0x1b0 [ 38.693403][ T17] __kasan_slab_free+0x162/0x180 [ 38.698318][ T17] ? disconnect_rio+0x12b/0x1b0 [ 38.703144][ T17] kfree+0xe4/0x2f0 [ 38.706995][ T17] disconnect_rio+0x12b/0x1b0 [ 38.711663][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 38.716851][ T17] ? usb_autoresume_device+0x60/0x60 executing program executing program [ 38.722133][ T17] device_release_driver_internal+0x42f/0x500 [ 38.722276][ T1741] usb 4-1: USB disconnect, device number 2 [ 38.728191][ T17] bus_remove_device+0x2dc/0x4a0 [ 38.738896][ T17] device_del+0x420/0xb10 [ 38.743233][ T17] ? __device_links_no_driver+0x240/0x240 [ 38.749011][ T5] usb 3-1: USB disconnect, device number 2 [ 38.749135][ T17] ? lockdep_hardirqs_on+0x379/0x580 [ 38.760204][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 38.765493][ T17] usb_disable_device+0x211/0x690 [ 38.770522][ T17] usb_disconnect+0x284/0x8d0 [ 38.775192][ T17] hub_event+0x1454/0x3640 [ 38.779590][ T17] ? find_held_lock+0x2d/0x110 [ 38.784356][ T17] ? mark_held_locks+0xe0/0xe0 [ 38.789230][ T17] ? hub_port_debounce+0x260/0x260 [ 38.794331][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 38.799854][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 38.805118][ T17] process_one_work+0x92b/0x1530 [ 38.810086][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 38.815435][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 38.820437][ T17] worker_thread+0x96/0xe20 [ 38.824929][ T17] ? process_one_work+0x1530/0x1530 [ 38.830105][ T17] kthread+0x318/0x420 [ 38.834147][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 38.839494][ T17] ret_from_fork+0x24/0x30 [ 38.844240][ T17] [ 38.846545][ T17] Allocated by task 17: [ 38.850683][ T17] save_stack+0x1b/0x80 [ 38.854827][ T17] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 38.860449][ T17] probe_rio+0x135/0x248 [ 38.864677][ T17] usb_probe_interface+0x305/0x7a0 [ 38.869771][ T17] really_probe+0x281/0x6d0 [ 38.874258][ T17] driver_probe_device+0x101/0x1b0 [ 38.879350][ T17] __device_attach_driver+0x1c2/0x220 [ 38.884701][ T17] bus_for_each_drv+0x162/0x1e0 [ 38.889530][ T17] __device_attach+0x217/0x360 [ 38.894285][ T17] bus_probe_device+0x1e4/0x290 [ 38.899125][ T17] device_add+0xae6/0x16f0 [ 38.903525][ T17] usb_set_configuration+0xdf6/0x1670 [ 38.908882][ T17] generic_probe+0x9d/0xd5 [ 38.913365][ T17] usb_probe_device+0x99/0x100 [ 38.918104][ T17] really_probe+0x281/0x6d0 [ 38.922586][ T17] driver_probe_device+0x101/0x1b0 [ 38.927706][ T17] __device_attach_driver+0x1c2/0x220 [ 38.933064][ T17] bus_for_each_drv+0x162/0x1e0 [ 38.937889][ T17] __device_attach+0x217/0x360 [ 38.942630][ T17] bus_probe_device+0x1e4/0x290 [ 38.947461][ T17] device_add+0xae6/0x16f0 [ 38.951853][ T17] usb_new_device.cold+0x6a4/0xe79 [ 38.956982][ T17] hub_event+0x1b5c/0x3640 [ 38.961377][ T17] process_one_work+0x92b/0x1530 [ 38.966290][ T17] worker_thread+0x96/0xe20 [ 38.970768][ T17] kthread+0x318/0x420 [ 38.974817][ T17] ret_from_fork+0x24/0x30 [ 38.979211][ T17] [ 38.981522][ T17] Freed by task 83: [ 38.985317][ T17] save_stack+0x1b/0x80 [ 38.989472][ T17] __kasan_slab_free+0x130/0x180 [ 38.994387][ T17] kfree+0xe4/0x2f0 [ 38.998218][ T17] disconnect_rio+0x12b/0x1b0 [ 39.002988][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 39.008173][ T17] device_release_driver_internal+0x42f/0x500 [ 39.014227][ T17] bus_remove_device+0x2dc/0x4a0 [ 39.019153][ T17] device_del+0x420/0xb10 [ 39.023482][ T17] usb_disable_device+0x211/0x690 [ 39.028509][ T17] usb_disconnect+0x284/0x8d0 [ 39.033160][ T17] hub_event+0x1454/0x3640 [ 39.037557][ T17] process_one_work+0x92b/0x1530 [ 39.042471][ T17] worker_thread+0x96/0xe20 [ 39.046949][ T17] kthread+0x318/0x420 [ 39.051011][ T17] ret_from_fork+0x24/0x30 [ 39.055496][ T17] [ 39.057812][ T17] The buggy address belongs to the object at ffff8881d43d9100 [ 39.057812][ T17] which belongs to the cache kmalloc-4k of size 4096 [ 39.071868][ T17] The buggy address is located 0 bytes inside of [ 39.071868][ T17] 4096-byte region [ffff8881d43d9100, ffff8881d43da100) [ 39.085040][ T17] The buggy address belongs to the page: [ 39.090653][ T17] page:ffffea000750f600 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 39.101574][ T17] flags: 0x200000000010200(slab|head) [ 39.106938][ T17] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 39.118728][ T17] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 39.127289][ T17] page dumped because: kasan: bad access detected [ 39.133684][ T17] [ 39.135988][ T17] Memory state around the buggy address: [ 39.141607][ T17] ffff8881d43d9000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.149652][ T17] ffff8881d43d9080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.157704][ T17] >ffff8881d43d9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.165739][ T17] ^ [ 39.169787][ T17] ffff8881d43d9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.177823][ T17] ffff8881d43d9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.185869][ T17] ================================================================== [ 39.193929][ T17] Disabling lock debugging due to kernel taint [ 39.200143][ T17] Kernel panic - not syncing: panic_on_warn set ... [ 39.204989][ T12] usb 2-1: USB disconnect, device number 2 [ 39.206731][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Tainted: G B 5.3.0+ #0 [ 39.218817][ T102] usb 6-1: USB disconnect, device number 2 [ 39.220894][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.220908][ T17] Workqueue: usb_hub_wq hub_event [ 39.220920][ T17] Call Trace: [ 39.245115][ T17] dump_stack+0xca/0x13e [ 39.249351][ T17] panic+0x2a3/0x6da [ 39.253224][ T17] ? add_taint.cold+0x16/0x16 [ 39.257884][ T17] ? disconnect_rio+0x12b/0x1b0 [ 39.262713][ T17] ? trace_hardirqs_on+0x55/0x1e0 [ 39.267711][ T17] ? disconnect_rio+0x12b/0x1b0 [ 39.272542][ T17] end_report+0x43/0x49 [ 39.276673][ T17] kasan_report_invalid_free+0x7d/0xa0 [ 39.282715][ T17] ? disconnect_rio+0x12b/0x1b0 [ 39.287545][ T17] __kasan_slab_free+0x162/0x180 [ 39.292460][ T17] ? disconnect_rio+0x12b/0x1b0 [ 39.297283][ T17] kfree+0xe4/0x2f0 [ 39.301066][ T17] disconnect_rio+0x12b/0x1b0 [ 39.305730][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 39.310912][ T17] ? usb_autoresume_device+0x60/0x60 [ 39.316172][ T17] device_release_driver_internal+0x42f/0x500 [ 39.322215][ T17] bus_remove_device+0x2dc/0x4a0 [ 39.327128][ T17] device_del+0x420/0xb10 [ 39.331434][ T17] ? __device_links_no_driver+0x240/0x240 [ 39.337131][ T17] ? lockdep_hardirqs_on+0x379/0x580 [ 39.342570][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 39.347829][ T17] usb_disable_device+0x211/0x690 [ 39.352838][ T17] usb_disconnect+0x284/0x8d0 [ 39.357490][ T17] hub_event+0x1454/0x3640 [ 39.361895][ T17] ? find_held_lock+0x2d/0x110 [ 39.366636][ T17] ? mark_held_locks+0xe0/0xe0 [ 39.371384][ T17] ? hub_port_debounce+0x260/0x260 [ 39.376470][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 39.381994][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 39.387265][ T17] process_one_work+0x92b/0x1530 [ 39.392198][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 39.397544][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 39.402544][ T17] worker_thread+0x96/0xe20 [ 39.407029][ T17] ? process_one_work+0x1530/0x1530 [ 39.412202][ T17] kthread+0x318/0x420 [ 39.416333][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 39.421691][ T17] ret_from_fork+0x24/0x30 [ 39.426850][ T17] Kernel Offset: disabled [ 39.431159][ T17] Rebooting in 86400 seconds..